• Select the right size: Interdental brushes come in various sizes to fit different gaps between your teeth. Choose a size that fits into the spaces between your teeth without forcing it, which can hurt your gums. You might start with a smaller size to test this out.

• Preparation: Before using the interdental brush, make sure your hands are clean. You can use it dry, or you can moisten the brush with water or a small amount of fluoride mouthwash if you have it.